Exteacts



(No Model.)

S. C. THRALL.- APPARATUS FOR MAKING EXTRAGTS. No. 449,603. Patented Mala-31,1891.

St BY lllllll- THE Nonms persas ce, wowilmo., wAsHwu'roN, u. c.

'fill/Immun aff' @ff/ WITNESSES:

l l l l l l l 1 l l l f UNITED STATES PATENT GFFICE.;

STEPHEN C. TI'IRALII, 0F ELK RAPIDS, MICHIGAN, ASSIGNOR OF ONE-HALF TO IVILLIAM B. CHANDLER, OF SAME PLACE.

.APPARATUS FOR MAKING EXTRACTS.

SPECIFICATION forming part of Letters Patent No. 449,603, dated March 31, 1891.

Application tiled June 2 3, 1890. Serial 110.356,499. (No model.)

.To LZ/Z whom, it may concern: Il', through which passes another sec-tion of Be it known that I,STEPHEN C. THRALL, a pipe C, which is joined to section C by seccitizen of the United States, residing at Elk tion C and suitable elbows, and being pro- Rapids, in the county of Antrim and State of vided with a coupling E, the lower portion 55 5 Michigan, have invented certain new and useis therebydetachable. This sectionis threaded ful Improvements in Apparatus for Making where itpasses through and is secured to the Extracts; and I do hereby declare the followcover by the usual threaded boss. IVithin ing to be a full, clear, and exact description an opening 71., in the cover H,I place avalve of the invention, such as will enable others which consists of an ordinarystemmed safety- 6o 1o skilledin the art to which itappertains to make valve with a hole bored vertically through the and use the same. stem and provided with a countersink, to My invention relates to the construction of which is adapted a valve J, provided with a 4an apparatus for extracting from vegetable stem M.

or other substances their essential soluble I represents the steam-valve; N, the stem, 6'5 properties. provided with a spring L, and K a nut engag- My object is to produceasimple apparatus ing with the valve-casing V, provided with adapted to perform this process in an expethe ports IV. rlhis device thus forms a com ditious and effective manner; and it consists bined steam and air valve, as will be readily in the construction, combinatiomandarran geappreciated. 70 2o ment of the parts hereinafter described, and At the lower end of pipe C, I place a perpointed out in the claims, reference being foi-ated strainer I). had to the accompanying drawings,wherein- It will now be seen and readily understood Figure l is a plan view of the apparatus. that it the material to be extracted is placed f Fig. 2 represents a vertical section of the in the vesselB and the waterorothersolvent 75 same on the line X X of Fig. l; and Fig. 3 a in vessel A and heat be applied to the latter, detail of a bulb or enlarged end of the pipe steam generated therein will. force the liquid for containing the material whenever it may through the pipes into vessel B and the air be desirable to strain the extract. will pass out through the air-valve J. As the A represents the heating-vessel, preferably vessel fills, and as soon as the water in A falls 8o 3o conical, of sheet metal, and provided with a below the end of the pipe C, steam will be top which may be made air-tight by any suitforced through into B, thereby heating the able device, preferably having the cover II water in B, which will soon reach the boilingsecured to an inwardly-turned flange with a point and begin to generate steam, the presspacking U between them, and provided with ure of which will close the air-valve J. The 85 an aperture havinganinterior-threaded boss, process of steeping o1' extracting now prointo which is screwed the end of a section of ceeds at a much higher temperature under pipe C, having its lower end suspended a suitthe back-pressure of the steam, which may be able distance from the bottom of the vessel regulated by the safety-valve. IVhen the to insure the retention therein of a sufficient liquid in vessel A is sufficiently evaporated, 9o 4o quantity of liquid to make steam in sufiicient the heat is removed and the apparatus perJ volume to thoroughly heat the material. In mitted to cool. The condensation of the vathis construction I use ordinary steam pipe, por in A formsa vacuum, and as the vapor in elbows, and fittings, and above the cover I vessel B condenses the valve J opens andthe place a valve F and above the valve F an orair being admitted the liquid in vesselBiiows 95 dinary union G, whereby, if desired, the vesback through the pipes into vessel A. The sel A may be closed air-tight, and, by unvalve E may now be closed and A detached, screwing G, detached. if desired. By the use of this apparatus B represents the vessel provided for conwherebythe delicatebuthighlyvolatile aroma taining the material, and it is provided with is preserved, extracts of tea and coffee for do- 10o 5o feet T and relatively to A, is an inverted mestic use of ahighly superiorqualitycan be cone, and is provided with an air-tight cover produced, also of medical herbs, their potent 1ncdicinalproperties, which ordinarily escape by evaporatiombeing retained. To this pro` cess'l make no claim in the present application, as thesame is claimedin an application filed by me June 23, 1890, and numbered 365,500.

As it may be desirable to confine the material from which the extract is made, I have provided the device shown in Fig. 3, which device is interchangeable with the parts C and D shown in Fig. 2. Referring to Fig. 3, O designates a plain metal cylinder having a conical top 0, terminating in or fastened to a section of pipe C", which at its upper end screws into the union E. -Within this cylinder is a perforated piston l, which is heldin position by a slnall pistonrod S, which plays freely in the pipe C", and on the bottom of the cylinder is a convex perforated cap D, which is held in place by a flanged ring Q. This cylinder is filled by removing the cap D inverting the cylinder to allow the piston to fall to the end o thereof, putting in the inaterial and replacing the cap, after which it is connected with the pipes connecting the two vessels. By the use of this cylinder the water or other solvent is twice percolated through the material, besides subjecting it to the same steam-pressure as by the othermethod in extracting the soluble properties from the vegetable substances used.

lVhat I claim, and desire to secure by Letters Patent of the United States, is-

l. In an apparatus for extracting from vegetable or other substances their soluble properties, the combination, with an air-tight heating-vessel, of an air-tight containing-vessel connected therewith and provided with a cover formed with an opening, a steam-valve in said openin g having a hollow stem and an opening registering with the opening in said stem,and an air-valve closing the opening in said steam-valve and having a stem extending through the stem of said steam-valve, substantially as shown and described.

2. In an apparatus for extracting from vegetable or other substances their soluble properties, the combination, with an air-tight heating-vessel, of an air-tight containing-vessel connected therewith and provided with a cover formed with an opening, avalve-casing secured to said cover over said opening and having ports, and a threaded opening in its top, a nut within the opening in the top of said valve-casing and having threads engaggaging the threads thereof, a steam-valve within the opening in said cover, said valve having a hollow stem projecting through said valve-casing and an opening registering with the opening through said stem, a spring surrounding said valve-stem, and an air-valve closing the opening in said steam-valve and having a stem extending through the stem thereof.

3. An apparatus for extracting from vegetable or other substances the soluble properties thereof, consisting of an air-tight heatingvessel, an air-tight containing-vessel provided with air and safety valves, and a strainer located within said containing-vessel and having communication with the interior of said heating\*essel,said strainer comprising a cylinder having a perforated bottom and a perforated piston having a piston-rod located within said cylinder.

4. In an apparatus for extractin gf rom vegetable or other substances their soluble properties, the combination of an air-tight heatin g-vessel A and an air-tight containing-vessel B, having safety and air valves, with an inverted-U-shaped pipe connecting the lower portions of the interior of said vessels, and a strainer within said containing-vessel and,

consisting of a cylinder having a perforated bottom,and a perforated piston and a pistonrod located within said cylinder.

5. In an appara-tus for extracting from vegetable or other substances their soluble properties, the combination, with an air-tight heating-vessel A,and an ai r-tight containingvessel B, provided with a safety-valve I and an air-valve J, of an inverted-U-shaped connection between said vessels, said connections comprising three pipes, one of which passes through the cover of vessel A, and is provided with a valve F, another passes through the cover of vessel B, and has its lower end located in a plane below that of the lower end of the section within the heatingvessel and provided with a strainer, and the other section connects together the upper ends of said sections of pipe.

In testimony whereof I affix my signature in presence of two witnesses.

STEPHEN C. THRALL.

Witnesses:

DENNIs L. ROGERS, LUTHER V. MoULToN.

IOD 

